Iron(II)sulfide Has a Primitive Cubic Unit Cell with Sulfide Ions

question 35

Multiple Choice

Iron(II) sulfide has a primitive cubic unit cell with sulfide ions at the lattice points.The ionic radii of iron(II) ions and sulfide ions are 88 pm and 184 pm,respectively.What is the density of FeS (in g/cm³) ?

• A) 2.56 g/cm³
• B) 4.71 g/cm³
• C) 5.25 g/cm³
• D) 6.66 g/cm³
• E) 8.97 g/cm³

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